This flag is an Army of Northern Virginia, 2nd wool bunting issue. It was manufactured at the Richmond Clothing Depot in June, 1862.
The flag was captured on September 17, 1862 during the Battle of Antietam
(Sharpsburg) by Private John P. Murphy, Co. K, 5th Ohio Infantry. Private
Murphy was recommended for and received the Congressional Medal of Honor.
The flag was eventually forwarded to the U.S. War Department where it was
assigned Capture Number 521. It was returned to the State of Alabama effective
April 26, 1905.

Sources: Biggs, Greg. "Ragged Rags of Rebellion. The Flags of the Confederacy," an unpublished
manuscript, Curator's Files, Alabama Department of Archives and History. Curator's Object Files, Civil War Flags, Alabama Department of Archives and History. U.S. War Department. American Decorations 1862-1926, Washington, Government
Printing Office, 1927. U.S. War Department. War of the Rebellion: A Compilation of the Official Records of the Union and Confederate Armies. Government Printing Office, 1880-1901. Woodhead, Henry, editor. Echoes of Glory, Arms and Equipment of the Confederacy. Time Life Books, Alexandria, Virginia, 1991.